Refrigeration device



May 10, 1932. L. M. CROSLEY REFRIGERATION DEvicE Filed Nov. 19, 1928 zjvslvrox.

ATTORNEYS Patented May 10, 1932 UNITED STATES PATENT OFFICE LEWIS M. CROBLEY, OIB CINCINNATI, OHIO, ABSIGNOB TO THE OBOSLEY RADIO COR- PORATION, OF CINCINNATI, OHIO, A CORPORATION 01' OHIO REFRIGERATION DEVICE Application. fled November 19, 1928. Serial No. 820,318.

My invention relates to portable refri eration units of the general type shown an described in ap lication for etters Patent of D. F. Keith, er. No. 201,904, filed June 27, 1927. In this type of device there are two receivers or balls, one of which serves as a generator absorber and the other of which serves as a condenser evaporator. Intermediate the two balls is a conduit which serves to connect them and also to support the structure during its use. Within this conduit are located the various necessary parts serving to separate the path of the refrigerant to and from the generator absorber.

It is my object to simplify and increase the reliability of action of the device shown in the application for patent to Keith above mentioned and particularly to facilitate the drainin of the condenser evaporator and to provide against sudden surges set up by pressure in the device from breaking the seal which disassociates the inflow and outflow from the generator absorber. These objects and other advantages to be noted I accomplish by that certain construction and arrangement of parts of which a typical example is shown and described and the novelty of which will be set forth in the claims.

In the drawings:

Figure 1 is a central vertical section through the device.

Figure 2 is a detail of the valve.

Figure 3 is a perspective of the bafiie.

As has been stated the particular mechanism to which I have applied my improvements is the design evolved by D. F. Keith in his aforesaid application for Letters Patent. My invention is however, applicable to a variety of designs and I have shown it applied to the Keithe device because it is of familiar type and very widely used. The device illustrated has a generator absorber ball 1, a condenser evaporator ball 2, and a connection conduit 3. The conduit extends at the condenser evaporator end beyond the port from the condenser evaporator as shown at 4 to provide a sump. The condenser evaporator is secured to the conduit and has a. tube 6 extending well into the conduit. A baflle formed of a. zigzag metal strip 7 is housed within the conduit 'ust above the tube 6. This bafile acts as a de ydrator since the vapors from the generator absorber will traverse the zagzag plate and drops of moisture will collect thereon and fall into the sump without entering the tube 6. Inserted in the horizontal portion of the conduit close to where it bends down. to the condenser evaporator is inserted a plate 8 which acts as a dam in a manner which will he descrlbed. A carrying handle 9 is mounted on the conduit and has a foot 10 secured thereto and on which the device rests when it is in draining position.

The vertical portion 11 of the conduit is connected to the generator absorber shell and within this portion of the conduit a liquid seal is established, the level of which is indicated at 12, which level is defined by the upper end of the tube 13 which acts during the absorption cycle of the device.

Set into the top of the generator absorber ball is a tube 14 which terminates below the level of the seal. An annular channel shaped housing is secured over the upper end of the tube 14 and restin on top of the tube is a valve plate 16 whic is larger than the opening 17 in the housing.

As so constructed the operation of the device is as follows: Considering the generator absorber as filled with a suitable absorbent and the end of the pipe 13 fully submerged therein, the condenser evaporator shell is placed in a cooling medium and heat applied to the generator absorber shell. This results in eva orating the refrigerant, such as for examp e, ammonia gas with which the absorbent is saturated, the said vapor passing u through the tube 14, forcing up the valve p ate 16 and escaping through the liquid seal 12 into the conduit. The vapors pass through the conduit, flowing over the valve 8 and baffle 7, and passing into the condenser evaporator through the pipe 6. This is continued until the refrigerant has been largely driven off from the generator absorber and sufiicient pressure built up in the condenser evaporator to cause the vapors of the refrigerant to condense, in the presence of the heat absorbing medium in which the condenser evaporator is submerged.

As soon as the heat is discontinued and the tem erature drops in the erator absorber, the liquid refrigerant wil start to evaporate resultm in a large absorption of heat. The

ases wi l flow through the tube 13 and down mto the absorbent in the generator absorber into which absorbent they will become dissolved.

The liquid seal 12 prevents the gases from flowing into the enerator absorber throu h the tube 14 and ifiiy accident there shouldbe insuflicient liquid in the seal, or if a sudden surge of pressure should develop durin either cycle of the device, the valve lfi w1l prevent the refrigerant gas from P5185111, into the generator absorber through the tu e 14. The pressure present in the conduit and the static head of the li uid seal itself will keep the valve 16 closed own against the tube 14 except during the generation step Wl'llCll has been described.

After the refrigerant has evaporated and there is equal pressure within the generator absorber, and within the conduit, the device is again applied to a source of heat to regenerate the system. Prior to this the system should be drained of all liquid which is done by mverting the structure permitting it to rest on the enerator absorber ball 1 and the foot 10. ac to the large opening in the tube 6, and the freedom for assage of liquid past the baflle andQthroug the conduit, a very short interval will result in a complete dramage of the absorbent from all parts of the system beyond the dam 8. The device is then righted and the liquid within the conduit 3 will flow into the generator absorber through the tube 13 and will not flow back into the sum 4 because of the presence of the dam 8. S cient of the liquid will collect in the portion 11 of the conduit to reestablish the liquid seal 12. a

It is apparent that my im rovements are ap licable to other than ball aped receivers and that with obvious modifications, they can be applied to a variety of refrigeration devices of the absorption type.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

1. In an absorption system refrigeration device the combmation of a generator-absorber chamber, a condenser-evaporator chamber,'a conduit between them, means for establishing a liquid seal between the interior of the conduit and the generator-absorber chamber, a passageway from the generatorabsorber chamber terminating at a point below the level of said seal, and a valve for said passa way.

2. an absorption system refrigeration device the combination of a generator-absorber chamber, a condenser-evaporator chamber a conduit between them, means for establishing a liquid seal between the interior of the conduit and the generator-absorber chamber, a passageway from the generatorabsorber chamber terminating at a point below the level of said seal, and a valve for said passageway, said valve ap lied to the terminus of the passageway an actin as a check valve under the static head of the iquid seal.

3. In an absorption system refrigeration device the combination of a generator-absorber chamber, a condenser-evaporator chamber, a conduit between them, means for establishing a liquid seal between the interior of the conduit and the generator-absorber chamber, a passageway from the generatorabsorber chamber terminating at a point below the level of said seal, and a valve for said passageway, said valve formed as a disc laced over the end of the passageway beow the level of the liquid seal, a housing around the disc to hold it against moving out of position, as and for the purpose described.

4. In an absorption system refrigeration device the combination of a generator-absorber, a condenser-eve orator and a conduit between them, of a ehydration baflle formed of a zig-zag strip of metal set into the conduit above the generator-absorber connection with said conduit, and means for collecting deposited moisture from said ballle at a point beyond the point of connection of the generator-absorber.

5. In an absorption system refri eration device the combination of a casing orming a generator-absorber, a casing forming a condenser-evaporator, a conduit between them, a port from the condenser-evaporator thereinto, and ports from the generator-absorber theremto, and a dam located in the conduit at a position to lie above the liquid level maintained when daining the condenser-evaporator by inverting the position of the structure, whereb the movement of liquid back into the con sneer-evaporator upon righting the structure is prevented, said structure provided with means for supporting it u on a desired level surface in a position to efine the proper inverted position thereof for drain- 6. In a device of the character described, includin two vessels and a conduit extending up rom one vessel, then crossing over, and then extending down to the upper part of the other vessel, a dam in the cross -over part of said conduit, and a bathe in the ownwardly extending part of said conduit havin a shape defining a sinuous path through sai downwardly extendin art of said conduit.

LE M. CROSLEY'. 

